Analog Devices Inc. ADUM4152BRIZ-RL

Overview

ADUM4152BRIZ-RL from Analog Devices is a 7-channel SPIsolator digital isolator optimized for isolated SPI bus interfaces in industrial control systems. It provides four high-speed bidirectional SPI signal isolation channels (MCLK, MO/SI, MI/SO, MSS) supporting up to 17 MHz clock rate with 14 ns propagation delay and 1 ns jitter, plus three independent 250 kbps low-speed data channels (VIA, VIB, VIC), all in a reinforced 5 kV rms isolation barrier.

For engineers reviewing the ADUM4152BRIZ-RL datasheet, ADUM4152BRIZ-RL pinout, ADUM4152BRIZ-RL application, or ADUM4152BRIZ-RL equivalent, this device delivers deterministic timing for real-time SPI communication across galvanic barriers in PLCs, motor drives, and isolated sensor front-ends-where high CMTI (>25 kV/µs), 125°C operation, and regulatory compliance (UL, VDE, IEC 62368-1, IEC 60601-1) are mandatory.

Technical Context

The ADUM4152BRIZ-RL implements iCoupler® chip-scale transformer technology to isolate SPI signals without optocouplers or external components. Its four fast channels use synchronous sampling with glitch filtering on MSS, while three slow channels employ asynchronous serialization at 250 kbps with 2.5 µs jitter.

It supports mixed-voltage operation (3.3 V/5 V or 5 V/3.3 V across sides), features undervoltage lockout at 2.6 V per supply, and maintains reinforced insulation integrity under transient stress up to 10,000 V peak surge voltage and continuous working voltage of 456 V rms.

Key Specifications

Pinout & Package

ADUM4152BRIZ-RL is housed in a 20-lead SOIC_IC package with 8.3 mm creepage and clearance, rated for 5 kV rms reinforced isolation. Pin assignments follow the ADuM4152 functional block diagram: Side 1 (VDD1) includes MCLK, MO, SO, MSS, VIA, VIB, VIC inputs; Side 2 (VDD2) includes SCLK, SI, MI, SSS, VOA, VOB, VOC outputs; GND1/GND2 and VDD1/VDD2 supply pins are segregated per side.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SPI isolation applications.

Compared with ADUM4151BRIZ-RL and SI8652ED-B-IS, the ADUM4152BRIZ-RL uniquely combines MSS glitch filtering, 5 kV reinforced isolation, and three independent low-speed channels-making it the only option among the three qualified for medical-grade SPI isolation with deterministic timing control.

Availability

ADUM4152BRIZ-RL is available at Aetrix Electronics and suitable for industrial PLCs, motor drive control boards, isolated sensor interfaces, and medical diagnostic equipment requiring stable component supply across extended temperature and safety-critical operating conditions.

Supply support for ADUM4152BRIZ-RL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADuM415x family was designed specifically to replace optocoupler-based SPI isolation with robust, low-jitter, high-CMTI digital isolation for mission-critical industrial and medical systems demanding long-term reliability and regulatory compliance.

FAQ

What is the maximum SPI clock frequency supported by ADUM4152BRIZ-RL?

The ADUM4152BRIZ-RL supports up to 17 MHz SPI clock rate under 5 V operation, with guaranteed timing performance including 14 ns propagation delay and ≤3 ns pulse width distortion. At 3.3 V operation, the maximum clock rate is 12.5 MHz, and mixed-supply configurations (e.g., 5 V/3.3 V) support up to 15.6 MHz. These values are validated across −40°C to +125°C and documented in Tables 1 and 4 of the ADUM4152BRIZ-RL datasheet.

Does ADUM4152BRIZ-RL support bidirectional data transfer on its high-speed channels?

Yes, ADUM4152BRIZ-RL supports bidirectional SPI data transfer through dedicated MO/SI and MI/SO channel pairs. The MO/SI channel isolates master-out/slave-in signals, while MI/SO handles master-in/slave-out-enabling full-duplex communication. Each fast channel operates with matched 14 ns propagation delay and 1 ns jitter, preserving SPI timing integrity in both directions without added latency asymmetry.

How does the MSS glitch filter in ADUM4152BRIZ-RL improve system reliability?

The MSS (Master Select Signal) glitch filter in ADUM4152BRIZ-RL prevents false slave selection caused by noise-induced narrow pulses on the chip-select line. By ensuring only pulses wider than the internal filter threshold pass through, it eliminates spurious peripheral activation during EFT or surge events. This feature is unique to ADUM4152BRIZ-RL within the ADuM415x family and directly enhances robustness in electrically noisy industrial environments.

What safety certifications apply to ADUM4152BRIZ-RL?

ADUM4152BRIZ-RL holds UL 1577 recognition (5000 V rms, 1 minute), DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation certification (VIORM = 645 V peak), IEC/EN/CSA 62368-1, IEC/CSA 60601-1 (1 MOPP), and IEC/CSA 61010-1. These approvals validate its suitability for safety-critical applications including medical devices and industrial control systems requiring dual-redundant isolation barriers.

Can ADUM4152BRIZ-RL operate with different supply voltages on each side?

Yes, ADUM4152BRIZ-RL supports mixed-supply operation: VDD1 and VDD2 may be independently set to 3.3 V or 5 V. Tested configurations include 5 V/3.3 V and 3.3 V/5 V, delivering up to 15.6 MHz SPI clock rate and maintaining full electrical specifications. This flexibility allows seamless interfacing between 3.3 V microcontrollers and 5 V legacy peripherals without level shifters.